What is the purpose of Equal-Cost Multipath (ECMP) in a Layer 3 data center network?

To provide a single path for all traffic to simplify routing.

To encrypt traffic between switches.

To load balance traffic across multiple equal-cost paths.

To replace the need for routing protocols.

What is a limitation of STP in data center networks?

It cannot prevent loops in any topology.

It requires a dedicated management network.

It only works with a single switch.

It can be slow to converge and may not utilize all available links.

A company is migrating from a traditional Layer 2 data center to an IP fabric with EVPN-VXLAN. They have a legacy application that requires a large Layer 2 broadcast domain (over 1000 VLANs). They also have a strict requirement to minimize the risk of broadcast storms. What is the best approach?

Route all traffic at Layer 3 and eliminate Layer 2

Use EVPN-VXLAN with BUM (Broadcast, Unknown Unicast, Multicast) traffic replication optimized via ingress replication or multicast groups

Use MC-LAG to extend the Layer 2 domain

Keep the legacy Layer 2 design and rely on STP to prevent loops

A network engineer is troubleshooting a VXLAN connectivity issue between two VTEPs. The VTEPs can ping each other, but VXLAN traffic is not being forwarded. The engineer suspects that the issue is with the VXLAN encapsulation. What is the most likely cause?

The VXLAN encapsulation is not enabled on the spine switches

The VXLAN VNI is not configured on both VTEPs

The MTU on the underlay is too small for VXLAN packets

The VTEPs are not in the same OSPF area

What is a VLAN in a data center switch?

A type of tunnel used to connect data centers.

A logical segmentation of a Layer 2 network into separate broadcast domains.

A routing protocol used between switches.

A physical partition of a switch into multiple devices.

Juniper NetworksCertified Associate, Data Center

Domain 1Objective 3

Layer 2 and Layer 3 Strategies JN0-281 Practice Questions (Page 2)

Part of the Data Center Architectures domain, which makes up ~30% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~11–18 in this domain), expect 2–4 from this objective — we provide 32 practice questions to prepare you well beyond it. (estimate)

32questions here

7free pages

10concepts

Questions 6–10

6foundation · easy
What is the purpose of Equal-Cost Multipath (ECMP) in a Layer 3 data center network?
Select an answer first
7foundation · easy
What is a limitation of STP in data center networks?
Select an answer first
8expert · hard
A company is migrating from a traditional Layer 2 data center to an IP fabric with EVPN-VXLAN. They have a legacy application that requires a large Layer 2 broadcast domain (over 1000 VLANs). They also have a strict requirement to minimize the risk of broadcast storms. What is the best approach?
Select an answer first
9expert · hard
A network engineer is troubleshooting a VXLAN connectivity issue between two VTEPs. The VTEPs can ping each other, but VXLAN traffic is not being forwarded. The engineer suspects that the issue is with the VXLAN encapsulation. What is the most likely cause?
Select an answer first
10foundation · easy
What is a VLAN in a data center switch?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to JN0-281

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Juniper Networks. “JN0-281” is a trademark of its owner, used for identification only.